Brake System for a Vehicle

Abstract

A brake system for a vehicle, in particular a rail vehicle, has a braking device, wherein the braking device has a braking apparatus for braking at least one wheel of the vehicle and the braking device has a pneumatic connecting apparatus for connecting to a pneumatic energy supply unit for supplying the braking apparatus with pneumatic braking energy. The braking apparatus is designed as a hydraulic braking apparatus, wherein the braking device has a conversion apparatus connected between the pneumatic connecting apparatus and the braking apparatus for converting the pneumatic braking energy into hydraulic braking energy.

1 . A braking system for a rail vehicle comprising
 a braking device, wherein   the braking device has a braking apparatus for braking at least one wheel of the rail vehicle and   the braking device has a pneumatic connection device for connection to a pneumatic energy supply unit for supplying the braking apparatus with pneumatic braking energy,   wherein   the braking apparatus is a hydraulic braking apparatus and wherein   the braking device has a converting device inserted between the pneumatic connection device and the braking apparatus for converting the pneumatic braking energy into hydraulic braking energy.   
     
     
         2 . The braking system according to  claim 1 , wherein
 the converting device comprises a converting unit,   the converting unit has a pneumatic input side, which is connectable to the pneumatic connecting device,   the converting unit has a hydraulic output side, which is connectable to the braking apparatus, and   the converting unit operates according to a principle of displacement with at least one piston-cylinder arrangement.   
     
     
         3 . The braking system according to  claim 1 , wherein
 the converting device is configured to convert an input pressure at the pneumatic input side to an output pressure at the hydraulic output side,   the output pressure is higher than the input pressure by 10 times to 200 times, the input pressure, and   the converting device comprises an input side piston-cylinder arrangement with an input side effective piston area and a mechanically coupled output side piston-cylinder arrangement with an output side effective piston area, wherein the input side effective piston area is 10 times to 200 times, the output side effective piston area.   
     
     
         4 . The braking system according to  claim 1 , wherein
 an adjusting device is provided, which is configured to reduce a working stroke of at least one braking element of the braking apparatus, wherein   the adjusting device is actuated by the converting device, wherein the converting device has a maximum working stroke and the actuation of the adjustment device only ensues when the working stroke of the converting device has reached 60% to 90% of the maximum working stroke;   the adjusting device comprises a piston-cylinder arrangement; and   the adjusting device is arranged in a common housing with the converting device.   
     
     
         5 . The braking system according to  claim 4 , wherein
 the adjusting device is configured to supply additional hydraulic fluid to a working chamber of the braking apparatus to reduce the working stroke of the at least one braking element,   the adjusting device is configured to supply, in a first step, during actuation of the braking apparatus, additional hydraulic medium to an intermediate storage, and to supply, in a second step following the first step, during a release of the braking apparatus, additional hydraulic medium from the intermediate storage to the working chamber; and   the intermediate storage is a spring-loaded storage, which autonomously supplies, in the second step, additional hydraulic medium to the working chamber.   
     
     
         6 . The braking system according to  claim 1 , wherein
 a slide protection device and/or a pneumatic pressure sensor is provided,   the slide protection device is configured to interrupt, under the control of a control device, a braking operation of the braking apparatus,   the pneumatic pressure sensor is configured to deliver a signal representative of a pneumatic braking pressure to a control device,   the slide protection device or the pneumatic pressure sensor is inserted between the pneumatic connection device and the converting device, the pneumatic pressure sensor being inserted between the slide protection device and the converting device;   the slide protection device comprises at least one venting valve controlled by the control device; and   the slide protection device or the pneumatic pressure sensor is arranged in a common housing with the converting device.   
     
     
         7 . The braking system according to  claim 1 , wherein
 at least one piston-cylinder assembly is provided, which defines a working chamber,   on the side of the piston facing away from the working chamber, a gas volume is defined, which is sealed from the environment,   the gas volume is connected to a respiration volume in such a way that a power loss created during use of the piston-cylinder arrangement due to the change of the gas volume is less than 2%;   the respiration volume is 2 l to 25 l; and   the respiration volume is arranged in a common housing with the converting device.   
     
     
         8 . The braking system according to  claim 1 , wherein
 the converting device comprises an emergency brake unit,   the emergency brake unit is connectable to a pneumatic emergency brake connection and,   the emergency brake unit is biased via the emergency brake connection with a pneumatic bias in such a manner that the emergency brake unit is actuated by the converting device upon a decrease of the pneumatic bias below a predeterminable value for initiating a braking operation, and   the emergency brake unit comprises a piston-cylinder assembly, which is biased by a mechanical, spring.   
     
     
         9 . A running gear for a rail vehicle comprising
 at least one wheel unit and   a braking system according to  claim 1 , wherein   the braking system is configured for braking at least one wheel unit of the running gear.   
     
     
         10 . A rail vehicle comprising
 at least one running gear with at least one wheel unit,   a wagon body supported on the at least one running gear, and   a braking system according to  claim 1  and configured for braking the at least one wheel unit, of the running gear, wherein   the converting device is arranged at the wagon body in a region of the at least one running gear.   
     
     
         11 . A method for actuating a braking device of a rail vehicle, comprising
 supplying a braking device via a pneumatic energy supply unit with pneumatic brake energy for braking at least one wheel of the rail vehicle,   converting pneumatic braking energy into hydraulic braking energy via a converting device inserted between the pneumatic energy supply unit and a braking apparatus of the braking device, and   hydraulically operating the braking device.   
     
     
         12 . The method according to  claim 11 , wherein
 the converting device converts an input pressure at a pneumatic input side to an output pressure at a hydraulic output side, and   the output pressure is higher than the input pressure by 10 times to 200 times the input pressure.   
     
     
         13 . The method according to  claim 11 , wherein
 a working stroke of at least one braking element of the braking apparatus is reduced via an adjusting device, and   the adjusting device is actuated by the converting device, wherein the converting device has a maximum working stroke and the actuation of the adjustment device only ensues when the working stroke of the converting device has reached 60% to 90% of the maximum working stroke.   
     
     
         14 . The method according to  claim 13 , wherein
 the adjusting device supplies additional hydraulic fluid to a working chamber of the braking apparatus to reduce the working stroke of the at least one braking element,   the adjusting device supplies, in a first step during actuation of the braking apparatus, additional hydraulic medium to an intermediate storage, and supplies, in a second step following the first step during a release of the braking apparatus, additional hydraulic medium from the intermediate storage to the working chamber,   the intermediate storage autonomously supplies the additional hydraulic medium to the working chamber.   
     
     
         15 . The method according to  claim 11 , wherein an emergency brake unit of the converting device is biased with a pneumatic bias in such a manner that the emergency brake unit actuates the converting device upon a decrease of the pneumatic bias below a predeterminable value for initiating a braking operation.